Joshua p



-J. E. MGGOQK. GOVERNOR EOE STEAM ENGINES.

`(No Model.)

WITNESSE UNTTED A STATES PATENT Ormea.

JOSHUA I). MCOOOK, OF RICHMOND, VIRGINIA, ASSIGNOR OF ONE-THIRD IO JAMES H. BRUCE, OF SAME PLACE.

GOVERNOR FOR STEAM-ENGINES.

SPECIFICATION' forming part of Letters Patent No. 264,043, dated September 5, 1882.

Application tiled July 22, 1882.

To all whom it may concern:

Be it known that I, JOSHUA PARKER MC- OOOK, of Richmond, in the county of Henrico and State of Virginia, have invented a new and 5 Improved Governor for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention is an improvement in the class of valve-gear governors havingweighted arms 1o or levers that operate by centrifugal force to regulate the cut-off according to the speed of the engine, thus in turn increasing or diminishing the speed correspondingly. I employ a compound or variable eccentric in connection I5 ,with such weighted levers, and apply a spring to the latter, which supplements the effect of gravity in resisting centrifugal action, and thereby serves as a means for regulating the action of the governor upon the eccentric that 2e reciprocates the valve or cut-off. The construction, combination, and operation of these and other co-operating parts will be hereinafter described, reference being had to accompanying drawings, in whichz5 y Figures I and 2 are side elevations of my improved governor. Fig. 3 is a vertical central enlarged section of the main portion of the governor. Fig. 4 is a detail View, showing one of the weighted levers and its sleeve and pinion detached. Fig. 5 is an enlarged section on line x x, Fig. l.

The letter Aindicates the shaft of the engine, and B, Fig. 5, an eccentric disk xed on a sleeve, C, through which the shaft passes. Upon the other end of this sleeve is a bevelpinion, D, that meshes with a similar pinion, E, fixed on the lower end of a vertical shaft, F, Fig. 3, that carries a bevel-pinion, G, on its upper end. Said pinion Gr meshes with pinions H H, each of which is mounted solid, along with a weighted lever, I, on a sleeve, K, that is free to rotate on the horizontal shaft L-that is to say, each lever I carries a ball or weight, d, on its outer end, and is fixed with a pinion, H, on a sleeve, K, the two sleeves working independently on the same aXis, L. The latter has its bearings in vertical arms, constituting an attachment of the head b of a hollow shalt, M, which rotates in the standard N. Upon the aforesaid eccentric disk B is placed a shifting rin g-like eccentric, O-that is to say, the latter (No model.)

has a limited shifting circumferential movement on and around the disk B, the extremes thereof being determined by its connection with the collar or disk l?, which is provided 5 5 with a clamp-screw, c, or other suitable device for holding it set in any desired position to which it may be moved around the en gine-shaft A. The said connection between collar P and eccentric O is by means of a radial slot in the 6o former and a pin hXed in the latter, as shown in Fig. 2. The aforesaid shaft M, that revolves in the hollow standard N, has on its lower end an annular bevel-gear, Q, that meshes with a similar one, Q', fixed on the engine-shaft A, 65 contiguous to the pinion D on sleeve O.

So far as l have described the invention, the operation is as follows: The collar P is set as desired to regulate the position of the outer eccentric, O, on the inner one, B, which regulates 7o the throw of the valve, (not shown,) through the medium of the eccentric-rod, that is in practice attached to eccentric O in the usual way. Any variation from the speed so established willlessen orincrease centrifugal action, and thus cause the weighted levers I to vibrate on their fulcra, and thereby shift the eccentric disk B around the shaft A, which movement effects a change in the posit-ion of the ringeccentric O, causing it to become more nearly 8o concentric with the shaft, or else more eccentric thereto, as the case may be, and consequently changing the throw of the valve and admitting less or more steam to the cylinder correspondingly. In further explanation of the special operation of the parts connected with the weighted levers I, it may be stated that as the weighted ends ot' the latter rise the sleeves K and pinions H are rotated, and the latter in turn rotate the vertical shaft F, which 9o shifts the sleeve G and eccentric disk B, as will he readily understood. It will be observed that this action takes place without affecting the rotation of the levers I I with the hollow shaft IWI and around the shaft F. I will now describethe spring-regulating attachment of the weighted levers. The latter are extended above their sleeve-fulcra K and have arms d attached, as shown. The said arms are approximately right angular in shape Ico and screwed into the ends of the levers, and provided with jam-nuts e, for securing them in anydesired adjustment. Their upper ends are hook-shaped or otherwise suitably constructed to adaptthem for attachment of agum or spiral spring, t. Thus the levers I are connected by a spring which supplements the gravity of the weights, tending to prevent the latter rising, and its tension may be changed by adjusting the arms toward or from eachother for the purpose of regulating the action of the governorthat is to say, when the spring Ris under slight tension the governor acts more quickly and cuts off at alowcr speed than when the tension is greater.

Vhat I claim is- 1. The combination, with the engine-shaft and a compound eccentric for operating the cut-off', of the sleeve K, having the pinion attached, the vertical shaft- F, carrying piuions E, 

